Duct tape has been the answer to every sticky emergency since it was invented. But an interdisciplinary team of researchers may have created some competition for the universal adhesive. Scientists from Lewis & Clark College, the University of California at Berkeley, the University of California at Santa Barbara, and Stanford University have discovered a dry, self-cleaning glue that works under water and in a vacuum. The key to this new super glue? The gecko—one of the stickiest animals in nature. Kellar Autumn, assistant professor at Lewis & Clark's Department of Biology, says the team discovered that the gecko's amazing adhesiveness depends on the size and shape of the tips of its foot hairs—each made up of billions of 200-nm-sized fibers. This geometry "sticks" to whatever the gecko climbs on through weak molecular attractive forces called van der Waals forces. Van der Waals forces occur when two surfaces get very close to each other, and are not affected strongly by the chemical makeup of the materials. "This means we don't need to mimic biology precisely," Autumn says. "We can apply the underlying principles and create a similar adhesive by breaking a surface into small bumps. These preliminary physical models provide proof that humans can fabricate synthetic gecko adhesive." Although the glue is only in the proof of concept stages, Autumn foresees countless applications for synthetic gecko adhesive—from vacuum areas of clean rooms to outer space. He hopes the glue will be on the market within two years or so. For more information, contact Kellar Autumn by e-mail: firstname.lastname@example.org.
During a teardown of the iPad Air and Microsoft Surface Pro 3 at the Medical Design & Manufacturing Show in Schaumburg, Ill., an engineer showed this "inflammatory" video about the dangers of maliciously mishandling lithium-ion batteries.
The Window Watcher stops the burglar before he does damage or enters the house. House alarm service companies set off alarms and call the service only after the burglar has damaged and entered the house.
If you’re designing a handheld device or industrial machine that will employ a user interface, then you’ll want to check out the upcoming Design News Continuing Education Center course, "Engineering Principles Behind Advanced User Interface Technologies.”
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